SHIELDING STRUCTURE, SATELLITE BROADCASTING RECEPTION CONVERTER INCLUDING THE STRUCTURE, AND SATELLITE BROADCASTING RECEPTION ANTENNA UNIT INCLUDING THE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a shielding structure for reducing unnecessary radiation, and to provide a satellite broadcasting reception converter including the shielding structure, and a satellite broadcasting reception antenna unit including the shielding structure.;SOLUTION: The shielding structure 101 of a local oscillation circuit 13 including a dielectric resonator comprises: an insulating circuit board 53 for mounting the local oscillation circuit 13 on the first main surface S1; a frame 52 for covering the first area A1, on which the local oscillation circuit is mounted, in the circuit board from the side of the first main surface S1, so as not to generate an opening in the circumference; a bias line 12 which is at least partially arranged on the second main surface S2 being the rear surface of the first main surface S1 to supply bias potential to the local oscillation circuit 13 from the side of the second main surface; and a signal line 14 which is at least partially arranged on the second main surface S2 to take out the output signal of the local oscillation circuit 12 to the outside of the first area A1. A hole 22 for allowing the bias line and the signal line to penetrate from the first main surface to the second main surface is arranged inside the first area of the circuit board.;COPYRIGHT: (C)2009,JPO&INPIT